Pulmonary streptococcus anginosus infection

Last revised by Yuranga Weerakkody on 12 Sep 2022

Pulmonary streptococcus anginosus infection is a form of bacterial lung infection.

Streptococcus anginosus is part of the S. milleri group (which in turn is a subgroup of viridans streptococci) that consists of three distinct streptococcal species: S. anginosusS. intermedius, and S. constellatus. It can be part of the normal flora in the body 3.

Radiographic features

S. anginosus infection has a propensity for causing lung abscess and/or empyema formation. It is one of the limited number of infections that sometimes crosses lung fissures from one lobe to another 1. Pleural effusions are common 2.

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